Journal
NANOSCALE RESEARCH LETTERS
Volume 9, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/1556-276X-9-543
Keywords
Multicrystalline silicon; Porous silicon; Cr-TiO2; Photocatalysis; Amido black
Funding
- Ministry of Higher Education, Scientific Research and Technology of Tunisia
- Institut National de la Recherche Scientifique Canada, INRS-Energie, Materiaux et Telecommunications (INRS-EMT)
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This work deals with the deposition of Cr-doped TiO2 thin films on porous silicon (PS) prepared from electrochemical anodization of multicrystalline (mc-Si) Si wafers. The effect of Cr doping on the properties of the TiO2-Cr/PS/Si samples has been investigated by means of X-ray diffraction (XRD), atomic force microcopy (AFM), photoluminescence, lifetime, and laser beam-induced current (LBIC) measurements. The photocatalytic activity is carried out on TiO2-Cr/PS/Si samples. It was found that the TiO2-Cr/PS/mc-Si type structure degrades an organic pollutant (amido black) under ultraviolet (UV) light. A noticeable degradation of the pollutant is obtained for a Cr doping of 2 at. %. This result is discussed in light of LBIC and photoluminescence measurements.
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